[POWERPC] Move xmon_irq() declaration into xmon.h

The typdef for irqreturn_t was moved into its own header a
while back, so there's no reason we can't move xmon_irq()
into xmon.h now.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/platforms/chrp/setup.c

@@ -63,13 +63,6 @@ static struct mpic *chrp_mpic;
 DEFINE_PER_CPU(struct timer_list, heartbeat_timer);
 unsigned long event_scan_interval;
 
-/*
- * XXX this should be in xmon.h, but putting it there means xmon.h
- * has to include <linux/interrupt.h> (to get irqreturn_t), which
- * causes all sorts of problems.  -- paulus
- */
-extern irqreturn_t xmon_irq(int, void *);
-
 extern unsigned long loops_per_jiffy;
 
 /* To be replaced by RTAS when available */

arch/powerpc/platforms/powermac/pic.c

@@ -34,16 +34,10 @@
 #include <asm/time.h>
 #include <asm/pmac_feature.h>
 #include <asm/mpic.h>
+#include <asm/xmon.h>
 
 #include "pmac.h"
 
-/*
- * XXX this should be in xmon.h, but putting it there means xmon.h
- * has to include <linux/interrupt.h> (to get irqreturn_t), which
- * causes all sorts of problems.  -- paulus
- */
-extern irqreturn_t xmon_irq(int, void *);
-
 #ifdef CONFIG_PPC32
 struct pmac_irq_hw {
         unsigned int    event;

include/asm-powerpc/xmon.h

@@ -12,11 +12,14 @@
 
 #ifdef __KERNEL__
 
+#include <linux/irqreturn.h>
+
 #ifdef CONFIG_XMON
 extern void xmon_setup(void);
 extern void xmon_register_spus(struct list_head *list);
 struct pt_regs;
 extern int xmon(struct pt_regs *excp);
+extern irqreturn_t xmon_irq(int, void *);
 #else
 static inline void xmon_setup(void) { };
 static inline void xmon_register_spus(struct list_head *list) { };